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Reloading The .300 Winchester Magnum Rifle



(FN=Flat Nose, SP= Spire Point, HP= Hollow Point, RN= Round Nose), JHP= Jacketed Hollow Point, FMJ=Full Metal Jacket)

Loads for .300 Winchester Magnum Rifle:

(Note: These are near maximum loads, you should use 10% less to start.)
(See note on Powders below or read all about various Powders.)
Bullet is .308" diameter. Due to different barrel lengths, type of bullet, seating depth, primer type and other factors, you may not get near the FPS charted. It is just a guide and the reason you should start under these charges and work up.

-----------------------------------------
110 grain JSP (Jacketed Spire Point)
    H4895        68.0 gr.   3,494 FPS
    H380         72.0 gr.   3,638
    A2700        78.5 gr.   3,656
    A3100        82.0 gr.   3,419
-----------------------------------------
125 grain JSP (Sierra Spitzer Point)
    H4895        66.0 gr.   3,309 FPS
    H380         71.0 gr.   3,403
    A2700        74.5 gr.   3,478
    A3100        82.0 gr.   3,373
-----------------------------------------
150 grain JSP (Hornady Spire Point)
    IMR 4895     64.0 gr.   3,210 FPS
    H4350        74.0 gr.   3,244
    IMR 3031     49.5 gr.   2,850
    Reloader 12  59.0 gr.   3,105
    Reloader 15  65.3 gr.   3,180
    H380         71.0 gr.   3,303
    A2700        69.5 gr.   3,177
    A3100        76.0 gr.   3,108
-----------------------------------------
165 grain JSP (Spitzer Point)
    H4350        73.0 gr.   3,188 FPS
    Reloader 12  62.0 gr.   2,935
    Reloader 15  62.6 gr.   2,980
    Reloader 19  74.6 gr.   3,070
    Reloader 22  79.4 gr.   3,135
    H380         67.0 gr.   2,997
    A2700        67.0 gr.   2,959
    A3100        73.5 gr.   2,945
-----------------------------------------
180 grain JSP (Spitzer Point)
    H4350        71.0 gr.   3,079 FPS
    IMR 3031     58.5 gr.   2,900
    IMR 4895     59.0 gr.   2,950
    Reloader 19  72.3 gr.   2,990
    Reloader 22  76.9 gr.   3,030
    A2700        66.0 gr.   2,879
    A3100        72.0 gr.   2,899
-----------------------------------------
200 grain JSP (Sierra Spitzer Point)
    H4350        68.0 gr.   2,807 FPS
    Reloader 19  68.0 gr.   2,810
    Reloader 22  73.4 gr.   2,875
    A2700        62.0 gr.   2,697
    A3100        69.0 gr.   2,703
-----------------------------------------
220 grain JSPCL (Speer soft point "Core-Lokt")
    H4350        66.0 gr.   2,694 FPS
    IMR 3031     52.5 gr.   2,505
    IMR 4895     53.5 gr.   2,525
    A2700        59.5 gr.   2,445
    A3100        67.0 gr.   2,560
-----------------------------------------
Discussion: I have listed powders of IMR, Hodgdon, Alliant and Accurate. Use which ever you have handy. Slow burning powders generally work better in longer barrels and heavier bullets. 300 Mag. Cases will stretch, especially with hot loads, and you definitely need to check each in a case length guage and trim off excess brass. Of course, discard any cases that show a split anywhere on the case. For hunting at long distances with an unobstructed view, you should choose the spire point with a soft lead tip. For hunting at shorter ranges in brush, as is common in the woods of Alabama, you should choose a round nose bullet. They are less easily deflected and/or deformed by brush that you may be shooting through. The flat nose bullet is used especially in tubular fed magazines to prevent pressure on the primer in the cartridge above it.

There are a number of other high performance bullets on the market. The "boattail" is a very good long range target match bullet. It has very good wind performance. If you are shooting for precision, you should weight each powder charge and put exactly the same amount in each case.


Actually ALL 30 cal. bullets are .308 in diameter.


*
#2400, Reloader 7, 11, 12, 15, 19 and 22 are products of Alliant (formerly Hercules) Powders.
H380, H4350 and H4895 are products of Hodgdon Powders.
IMR 3031 and IMR 4895 are products of IMR (formerly DuPont) Powder Company.
#2700, and #3100 are products of Accurate Arms Company
WMR, WSF, WSL, 760, 748, 680, 231 and 540 are products of Winchester, Components Div.

References: Accurate Arms Co. 1996 Reloading booklet - - Alliant Powder Co. Reloaders' Guide (1995) - - Hodgdon's Basic Reloaders Manual (1996) - - Speer Reloading Manual, #12 - - Winchester Reloading Components Manual, 14th edition - - Lyman Piston & Revolver Reloading Handbook, 2nd edition. - - VihtaVuori Oy Company, reloading booklet (1995) - - Numerous magazine articles on reloading special calibers and personal loads where noted.

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This page created 1/13/96 by M.D. Smith and last modified on August 1, 1997 ©